1 /* $NetBSD: getcom.c,v 1.15 2021/05/02 12:50:43 rillig Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)getcom.c 8.1 (Berkeley) 5/31/93";
36 #else
37 __RCSID("$NetBSD: getcom.c,v 1.15 2021/05/02 12:50:43 rillig Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include "extern.h"
42
43 char *
getcom(char * buf,int size,const char * prompt,const char * error)44 getcom(char *buf, int size, const char *prompt, const char *error)
45 {
46 for (;;) {
47 fputs(prompt, stdout);
48 if (fgets(buf, size, stdin) == NULL) {
49 if (feof(stdin))
50 die();
51 clearerr(stdin);
52 continue;
53 }
54 while (isspace((unsigned char)*buf))
55 buf++;
56 if (*buf)
57 break;
58 if (error)
59 puts(error);
60 }
61 /* If we didn't get to the end of line, don't read it in next time. */
62 if (buf[strlen(buf) - 1] != '\n') {
63 int i;
64 while ((i = getchar()) != '\n' && i != EOF)
65 continue;
66 }
67 return (buf);
68 }
69
70
71 /*
72 * shifts to UPPERCASE if flag > 0, lowercase if flag < 0,
73 * and leaves it unchanged if flag = 0
74 */
75 char *
getword(char * buf1,char * buf2,int flag)76 getword(char *buf1, char *buf2, int flag)
77 {
78 int cnt;
79
80 cnt = 1;
81 while (isspace((unsigned char)*buf1))
82 buf1++;
83 if (*buf1 != ',') {
84 if (!*buf1) {
85 *buf2 = 0;
86 return (0);
87 }
88 while (cnt < WORDLEN && *buf1 &&
89 !isspace((unsigned char)*buf1) && *buf1 != ',')
90 if (flag < 0) {
91 if (isupper((unsigned char)*buf1)) {
92 *buf2++ =
93 tolower((unsigned char)*buf1++);
94 cnt++;
95 } else {
96 *buf2++ = *buf1++;
97 cnt++;
98 }
99 } else if (flag > 0) {
100 if (islower((unsigned char)*buf1)) {
101 *buf2++ =
102 toupper((unsigned char)*buf1++);
103 cnt++;
104 } else {
105 *buf2++ = *buf1++;
106 cnt++;
107 }
108 } else {
109 *buf2++ = *buf1++;
110 cnt++;
111 }
112 if (cnt == WORDLEN)
113 while (*buf1 && !isspace((unsigned char)*buf1))
114 buf1++;
115 } else
116 *buf2++ = *buf1++;
117 *buf2 = '\0';
118 while (isspace((unsigned char)*buf1))
119 buf1++;
120 return (*buf1 ? buf1 : NULL);
121 }
122